clytle374,
I am running 2 - 120 volt circuits, I could of connected them together for 240 volts but if one inverter goes down, The whole system don't function. I could of got away with just one unit to carry the loads but I would rather use two units working at their lower end of their full capability, for durability and reliability. If I have a failure, I can still use one unit while I connect other modified sine wave inverters I have for backup.
Diesel Guy